What Is a Modified Bitumen Roof?
A modified bitumen roof is a type of flat roofing system that uses asphalt mixed with polymers for added flexibility and durability. It typically involves installing multiple layers of the material to enhance protection against weather and wear. Modified bitumen roofing is highly durable and leak-resistant due to its two-ply, 8.0mm thick construction and staggered laps. Made from tar asphalt combined with rubber or plastic, it lasts a long time with regular inspections. It is preferred over single ply membranes—a mineral surfaced roof material—for better durability and protection.